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736 lines
21 KiB
736 lines
21 KiB
// SPDX-License-Identifier: GPL-2.0-only |
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/* |
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* tas5720.c - ALSA SoC Texas Instruments TAS5720 Mono Audio Amplifier |
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* |
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* Copyright (C)2015-2016 Texas Instruments Incorporated - https://www.ti.com |
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* |
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* Author: Andreas Dannenberg <[email protected]> |
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*/ |
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|
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#include <linux/module.h> |
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#include <linux/errno.h> |
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#include <linux/device.h> |
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#include <linux/i2c.h> |
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#include <linux/pm_runtime.h> |
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#include <linux/regmap.h> |
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#include <linux/slab.h> |
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#include <linux/regulator/consumer.h> |
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#include <linux/delay.h> |
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|
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#include <sound/pcm.h> |
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#include <sound/pcm_params.h> |
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#include <sound/soc.h> |
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#include <sound/soc-dapm.h> |
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#include <sound/tlv.h> |
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|
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#include "tas5720.h" |
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|
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/* Define how often to check (and clear) the fault status register (in ms) */ |
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#define TAS5720_FAULT_CHECK_INTERVAL 200 |
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|
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enum tas572x_type { |
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TAS5720, |
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TAS5722, |
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}; |
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|
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static const char * const tas5720_supply_names[] = { |
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"dvdd", /* Digital power supply. Connect to 3.3-V supply. */ |
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"pvdd", /* Class-D amp and analog power supply (connected). */ |
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}; |
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|
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#define TAS5720_NUM_SUPPLIES ARRAY_SIZE(tas5720_supply_names) |
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|
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struct tas5720_data { |
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struct snd_soc_component *component; |
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struct regmap *regmap; |
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struct i2c_client *tas5720_client; |
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enum tas572x_type devtype; |
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struct regulator_bulk_data supplies[TAS5720_NUM_SUPPLIES]; |
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struct delayed_work fault_check_work; |
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unsigned int last_fault; |
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}; |
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|
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static int tas5720_hw_params(struct snd_pcm_substream *substream, |
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struct snd_pcm_hw_params *params, |
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struct snd_soc_dai *dai) |
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{ |
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struct snd_soc_component *component = dai->component; |
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unsigned int rate = params_rate(params); |
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bool ssz_ds; |
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int ret; |
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|
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switch (rate) { |
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case 44100: |
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case 48000: |
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ssz_ds = false; |
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break; |
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case 88200: |
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case 96000: |
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ssz_ds = true; |
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break; |
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default: |
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dev_err(component->dev, "unsupported sample rate: %u\n", rate); |
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return -EINVAL; |
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} |
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|
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ret = snd_soc_component_update_bits(component, TAS5720_DIGITAL_CTRL1_REG, |
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TAS5720_SSZ_DS, ssz_ds); |
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if (ret < 0) { |
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dev_err(component->dev, "error setting sample rate: %d\n", ret); |
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return ret; |
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} |
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|
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return 0; |
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} |
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|
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static int tas5720_set_dai_fmt(struct snd_soc_dai *dai, unsigned int fmt) |
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{ |
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struct snd_soc_component *component = dai->component; |
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u8 serial_format; |
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int ret; |
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|
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if ((fmt & SND_SOC_DAIFMT_MASTER_MASK) != SND_SOC_DAIFMT_CBS_CFS) { |
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dev_vdbg(component->dev, "DAI Format master is not found\n"); |
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return -EINVAL; |
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} |
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|
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switch (fmt & (SND_SOC_DAIFMT_FORMAT_MASK | |
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SND_SOC_DAIFMT_INV_MASK)) { |
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case (SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF): |
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/* 1st data bit occur one BCLK cycle after the frame sync */ |
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serial_format = TAS5720_SAIF_I2S; |
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break; |
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case (SND_SOC_DAIFMT_DSP_A | SND_SOC_DAIFMT_NB_NF): |
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/* |
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* Note that although the TAS5720 does not have a dedicated DSP |
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* mode it doesn't care about the LRCLK duty cycle during TDM |
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* operation. Therefore we can use the device's I2S mode with |
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* its delaying of the 1st data bit to receive DSP_A formatted |
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* data. See device datasheet for additional details. |
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*/ |
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serial_format = TAS5720_SAIF_I2S; |
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break; |
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case (SND_SOC_DAIFMT_DSP_B | SND_SOC_DAIFMT_NB_NF): |
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/* |
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* Similar to DSP_A, we can use the fact that the TAS5720 does |
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* not care about the LRCLK duty cycle during TDM to receive |
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* DSP_B formatted data in LEFTJ mode (no delaying of the 1st |
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* data bit). |
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*/ |
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serial_format = TAS5720_SAIF_LEFTJ; |
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break; |
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case (SND_SOC_DAIFMT_LEFT_J | SND_SOC_DAIFMT_NB_NF): |
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/* No delay after the frame sync */ |
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serial_format = TAS5720_SAIF_LEFTJ; |
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break; |
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default: |
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dev_vdbg(component->dev, "DAI Format is not found\n"); |
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return -EINVAL; |
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} |
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ret = snd_soc_component_update_bits(component, TAS5720_DIGITAL_CTRL1_REG, |
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TAS5720_SAIF_FORMAT_MASK, |
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serial_format); |
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if (ret < 0) { |
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dev_err(component->dev, "error setting SAIF format: %d\n", ret); |
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return ret; |
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} |
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|
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return 0; |
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} |
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static int tas5720_set_dai_tdm_slot(struct snd_soc_dai *dai, |
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unsigned int tx_mask, unsigned int rx_mask, |
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int slots, int slot_width) |
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{ |
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struct snd_soc_component *component = dai->component; |
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struct tas5720_data *tas5720 = snd_soc_component_get_drvdata(component); |
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unsigned int first_slot; |
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int ret; |
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|
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if (!tx_mask) { |
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dev_err(component->dev, "tx masks must not be 0\n"); |
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return -EINVAL; |
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} |
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|
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/* |
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* Determine the first slot that is being requested. We will only |
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* use the first slot that is found since the TAS5720 is a mono |
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* amplifier. |
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*/ |
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first_slot = __ffs(tx_mask); |
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|
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if (first_slot > 7) { |
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dev_err(component->dev, "slot selection out of bounds (%u)\n", |
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first_slot); |
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return -EINVAL; |
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} |
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|
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/* Enable manual TDM slot selection (instead of I2C ID based) */ |
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ret = snd_soc_component_update_bits(component, TAS5720_DIGITAL_CTRL1_REG, |
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TAS5720_TDM_CFG_SRC, TAS5720_TDM_CFG_SRC); |
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if (ret < 0) |
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goto error_snd_soc_component_update_bits; |
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|
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/* Configure the TDM slot to process audio from */ |
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ret = snd_soc_component_update_bits(component, TAS5720_DIGITAL_CTRL2_REG, |
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TAS5720_TDM_SLOT_SEL_MASK, first_slot); |
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if (ret < 0) |
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goto error_snd_soc_component_update_bits; |
|
|
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/* Configure TDM slot width. This is only applicable to TAS5722. */ |
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switch (tas5720->devtype) { |
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case TAS5722: |
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ret = snd_soc_component_update_bits(component, TAS5722_DIGITAL_CTRL2_REG, |
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TAS5722_TDM_SLOT_16B, |
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slot_width == 16 ? |
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TAS5722_TDM_SLOT_16B : 0); |
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if (ret < 0) |
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goto error_snd_soc_component_update_bits; |
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break; |
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default: |
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break; |
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} |
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|
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return 0; |
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|
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error_snd_soc_component_update_bits: |
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dev_err(component->dev, "error configuring TDM mode: %d\n", ret); |
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return ret; |
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} |
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|
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static int tas5720_mute(struct snd_soc_dai *dai, int mute, int direction) |
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{ |
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struct snd_soc_component *component = dai->component; |
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int ret; |
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|
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ret = snd_soc_component_update_bits(component, TAS5720_DIGITAL_CTRL2_REG, |
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TAS5720_MUTE, mute ? TAS5720_MUTE : 0); |
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if (ret < 0) { |
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dev_err(component->dev, "error (un-)muting device: %d\n", ret); |
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return ret; |
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} |
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|
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return 0; |
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} |
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static void tas5720_fault_check_work(struct work_struct *work) |
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{ |
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struct tas5720_data *tas5720 = container_of(work, struct tas5720_data, |
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fault_check_work.work); |
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struct device *dev = tas5720->component->dev; |
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unsigned int curr_fault; |
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int ret; |
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|
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ret = regmap_read(tas5720->regmap, TAS5720_FAULT_REG, &curr_fault); |
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if (ret < 0) { |
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dev_err(dev, "failed to read FAULT register: %d\n", ret); |
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goto out; |
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} |
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|
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/* Check/handle all errors except SAIF clock errors */ |
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curr_fault &= TAS5720_OCE | TAS5720_DCE | TAS5720_OTE; |
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|
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/* |
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* Only flag errors once for a given occurrence. This is needed as |
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* the TAS5720 will take time clearing the fault condition internally |
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* during which we don't want to bombard the system with the same |
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* error message over and over. |
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*/ |
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if ((curr_fault & TAS5720_OCE) && !(tas5720->last_fault & TAS5720_OCE)) |
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dev_crit(dev, "experienced an over current hardware fault\n"); |
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if ((curr_fault & TAS5720_DCE) && !(tas5720->last_fault & TAS5720_DCE)) |
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dev_crit(dev, "experienced a DC detection fault\n"); |
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if ((curr_fault & TAS5720_OTE) && !(tas5720->last_fault & TAS5720_OTE)) |
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dev_crit(dev, "experienced an over temperature fault\n"); |
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|
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/* Store current fault value so we can detect any changes next time */ |
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tas5720->last_fault = curr_fault; |
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if (!curr_fault) |
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goto out; |
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|
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/* |
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* Periodically toggle SDZ (shutdown bit) H->L->H to clear any latching |
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* faults as long as a fault condition persists. Always going through |
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* the full sequence no matter the first return value to minimizes |
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* chances for the device to end up in shutdown mode. |
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*/ |
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ret = regmap_write_bits(tas5720->regmap, TAS5720_POWER_CTRL_REG, |
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TAS5720_SDZ, 0); |
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if (ret < 0) |
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dev_err(dev, "failed to write POWER_CTRL register: %d\n", ret); |
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|
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ret = regmap_write_bits(tas5720->regmap, TAS5720_POWER_CTRL_REG, |
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TAS5720_SDZ, TAS5720_SDZ); |
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if (ret < 0) |
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dev_err(dev, "failed to write POWER_CTRL register: %d\n", ret); |
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|
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out: |
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/* Schedule the next fault check at the specified interval */ |
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schedule_delayed_work(&tas5720->fault_check_work, |
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msecs_to_jiffies(TAS5720_FAULT_CHECK_INTERVAL)); |
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} |
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static int tas5720_codec_probe(struct snd_soc_component *component) |
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{ |
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struct tas5720_data *tas5720 = snd_soc_component_get_drvdata(component); |
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unsigned int device_id, expected_device_id; |
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int ret; |
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tas5720->component = component; |
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ret = regulator_bulk_enable(ARRAY_SIZE(tas5720->supplies), |
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tas5720->supplies); |
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if (ret != 0) { |
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dev_err(component->dev, "failed to enable supplies: %d\n", ret); |
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return ret; |
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} |
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|
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/* |
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* Take a liberal approach to checking the device ID to allow the |
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* driver to be used even if the device ID does not match, however |
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* issue a warning if there is a mismatch. |
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*/ |
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ret = regmap_read(tas5720->regmap, TAS5720_DEVICE_ID_REG, &device_id); |
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if (ret < 0) { |
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dev_err(component->dev, "failed to read device ID register: %d\n", |
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ret); |
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goto probe_fail; |
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} |
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switch (tas5720->devtype) { |
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case TAS5720: |
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expected_device_id = TAS5720_DEVICE_ID; |
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break; |
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case TAS5722: |
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expected_device_id = TAS5722_DEVICE_ID; |
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break; |
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default: |
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dev_err(component->dev, "unexpected private driver data\n"); |
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return -EINVAL; |
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} |
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|
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if (device_id != expected_device_id) |
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dev_warn(component->dev, "wrong device ID. expected: %u read: %u\n", |
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expected_device_id, device_id); |
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|
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/* Set device to mute */ |
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ret = snd_soc_component_update_bits(component, TAS5720_DIGITAL_CTRL2_REG, |
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TAS5720_MUTE, TAS5720_MUTE); |
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if (ret < 0) |
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goto error_snd_soc_component_update_bits; |
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|
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/* |
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* Enter shutdown mode - our default when not playing audio - to |
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* minimize current consumption. On the TAS5720 there is no real down |
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* side doing so as all device registers are preserved and the wakeup |
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* of the codec is rather quick which we do using a dapm widget. |
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*/ |
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ret = snd_soc_component_update_bits(component, TAS5720_POWER_CTRL_REG, |
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TAS5720_SDZ, 0); |
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if (ret < 0) |
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goto error_snd_soc_component_update_bits; |
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INIT_DELAYED_WORK(&tas5720->fault_check_work, tas5720_fault_check_work); |
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return 0; |
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error_snd_soc_component_update_bits: |
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dev_err(component->dev, "error configuring device registers: %d\n", ret); |
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|
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probe_fail: |
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regulator_bulk_disable(ARRAY_SIZE(tas5720->supplies), |
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tas5720->supplies); |
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return ret; |
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} |
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static void tas5720_codec_remove(struct snd_soc_component *component) |
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{ |
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struct tas5720_data *tas5720 = snd_soc_component_get_drvdata(component); |
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int ret; |
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|
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cancel_delayed_work_sync(&tas5720->fault_check_work); |
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|
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ret = regulator_bulk_disable(ARRAY_SIZE(tas5720->supplies), |
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tas5720->supplies); |
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if (ret < 0) |
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dev_err(component->dev, "failed to disable supplies: %d\n", ret); |
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}; |
|
|
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static int tas5720_dac_event(struct snd_soc_dapm_widget *w, |
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struct snd_kcontrol *kcontrol, int event) |
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{ |
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struct snd_soc_component *component = snd_soc_dapm_to_component(w->dapm); |
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struct tas5720_data *tas5720 = snd_soc_component_get_drvdata(component); |
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int ret; |
|
|
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if (event & SND_SOC_DAPM_POST_PMU) { |
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/* Take TAS5720 out of shutdown mode */ |
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ret = snd_soc_component_update_bits(component, TAS5720_POWER_CTRL_REG, |
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TAS5720_SDZ, TAS5720_SDZ); |
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if (ret < 0) { |
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dev_err(component->dev, "error waking component: %d\n", ret); |
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return ret; |
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} |
|
|
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/* |
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* Observe codec shutdown-to-active time. The datasheet only |
|
* lists a nominal value however just use-it as-is without |
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* additional padding to minimize the delay introduced in |
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* starting to play audio (actually there is other setup done |
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* by the ASoC framework that will provide additional delays, |
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* so we should always be safe). |
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*/ |
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msleep(25); |
|
|
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/* Turn on TAS5720 periodic fault checking/handling */ |
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tas5720->last_fault = 0; |
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schedule_delayed_work(&tas5720->fault_check_work, |
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msecs_to_jiffies(TAS5720_FAULT_CHECK_INTERVAL)); |
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} else if (event & SND_SOC_DAPM_PRE_PMD) { |
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/* Disable TAS5720 periodic fault checking/handling */ |
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cancel_delayed_work_sync(&tas5720->fault_check_work); |
|
|
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/* Place TAS5720 in shutdown mode to minimize current draw */ |
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ret = snd_soc_component_update_bits(component, TAS5720_POWER_CTRL_REG, |
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TAS5720_SDZ, 0); |
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if (ret < 0) { |
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dev_err(component->dev, "error shutting down component: %d\n", |
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ret); |
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return ret; |
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} |
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} |
|
|
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return 0; |
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} |
|
|
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#ifdef CONFIG_PM |
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static int tas5720_suspend(struct snd_soc_component *component) |
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{ |
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struct tas5720_data *tas5720 = snd_soc_component_get_drvdata(component); |
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int ret; |
|
|
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regcache_cache_only(tas5720->regmap, true); |
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regcache_mark_dirty(tas5720->regmap); |
|
|
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ret = regulator_bulk_disable(ARRAY_SIZE(tas5720->supplies), |
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tas5720->supplies); |
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if (ret < 0) |
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dev_err(component->dev, "failed to disable supplies: %d\n", ret); |
|
|
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return ret; |
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} |
|
|
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static int tas5720_resume(struct snd_soc_component *component) |
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{ |
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struct tas5720_data *tas5720 = snd_soc_component_get_drvdata(component); |
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int ret; |
|
|
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ret = regulator_bulk_enable(ARRAY_SIZE(tas5720->supplies), |
|
tas5720->supplies); |
|
if (ret < 0) { |
|
dev_err(component->dev, "failed to enable supplies: %d\n", ret); |
|
return ret; |
|
} |
|
|
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regcache_cache_only(tas5720->regmap, false); |
|
|
|
ret = regcache_sync(tas5720->regmap); |
|
if (ret < 0) { |
|
dev_err(component->dev, "failed to sync regcache: %d\n", ret); |
|
return ret; |
|
} |
|
|
|
return 0; |
|
} |
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#else |
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#define tas5720_suspend NULL |
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#define tas5720_resume NULL |
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#endif |
|
|
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static bool tas5720_is_volatile_reg(struct device *dev, unsigned int reg) |
|
{ |
|
switch (reg) { |
|
case TAS5720_DEVICE_ID_REG: |
|
case TAS5720_FAULT_REG: |
|
return true; |
|
default: |
|
return false; |
|
} |
|
} |
|
|
|
static const struct regmap_config tas5720_regmap_config = { |
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.reg_bits = 8, |
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.val_bits = 8, |
|
|
|
.max_register = TAS5720_MAX_REG, |
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.cache_type = REGCACHE_RBTREE, |
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.volatile_reg = tas5720_is_volatile_reg, |
|
}; |
|
|
|
static const struct regmap_config tas5722_regmap_config = { |
|
.reg_bits = 8, |
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.val_bits = 8, |
|
|
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.max_register = TAS5722_MAX_REG, |
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.cache_type = REGCACHE_RBTREE, |
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.volatile_reg = tas5720_is_volatile_reg, |
|
}; |
|
|
|
/* |
|
* DAC analog gain. There are four discrete values to select from, ranging |
|
* from 19.2 dB to 26.3dB. |
|
*/ |
|
static const DECLARE_TLV_DB_RANGE(dac_analog_tlv, |
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0x0, 0x0, TLV_DB_SCALE_ITEM(1920, 0, 0), |
|
0x1, 0x1, TLV_DB_SCALE_ITEM(2070, 0, 0), |
|
0x2, 0x2, TLV_DB_SCALE_ITEM(2350, 0, 0), |
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0x3, 0x3, TLV_DB_SCALE_ITEM(2630, 0, 0), |
|
); |
|
|
|
/* |
|
* DAC digital volumes. From -103.5 to 24 dB in 0.5 dB or 0.25 dB steps |
|
* depending on the device. Note that setting the gain below -100 dB |
|
* (register value <0x7) is effectively a MUTE as per device datasheet. |
|
* |
|
* Note that for the TAS5722 the digital volume controls are actually split |
|
* over two registers, so we need custom getters/setters for access. |
|
*/ |
|
static DECLARE_TLV_DB_SCALE(tas5720_dac_tlv, -10350, 50, 0); |
|
static DECLARE_TLV_DB_SCALE(tas5722_dac_tlv, -10350, 25, 0); |
|
|
|
static int tas5722_volume_get(struct snd_kcontrol *kcontrol, |
|
struct snd_ctl_elem_value *ucontrol) |
|
{ |
|
struct snd_soc_component *component = snd_soc_kcontrol_component(kcontrol); |
|
unsigned int val; |
|
|
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val = snd_soc_component_read(component, TAS5720_VOLUME_CTRL_REG); |
|
ucontrol->value.integer.value[0] = val << 1; |
|
|
|
val = snd_soc_component_read(component, TAS5722_DIGITAL_CTRL2_REG); |
|
ucontrol->value.integer.value[0] |= val & TAS5722_VOL_CONTROL_LSB; |
|
|
|
return 0; |
|
} |
|
|
|
static int tas5722_volume_set(struct snd_kcontrol *kcontrol, |
|
struct snd_ctl_elem_value *ucontrol) |
|
{ |
|
struct snd_soc_component *component = snd_soc_kcontrol_component(kcontrol); |
|
unsigned int sel = ucontrol->value.integer.value[0]; |
|
|
|
snd_soc_component_write(component, TAS5720_VOLUME_CTRL_REG, sel >> 1); |
|
snd_soc_component_update_bits(component, TAS5722_DIGITAL_CTRL2_REG, |
|
TAS5722_VOL_CONTROL_LSB, sel); |
|
|
|
return 0; |
|
} |
|
|
|
static const struct snd_kcontrol_new tas5720_snd_controls[] = { |
|
SOC_SINGLE_TLV("Speaker Driver Playback Volume", |
|
TAS5720_VOLUME_CTRL_REG, 0, 0xff, 0, tas5720_dac_tlv), |
|
SOC_SINGLE_TLV("Speaker Driver Analog Gain", TAS5720_ANALOG_CTRL_REG, |
|
TAS5720_ANALOG_GAIN_SHIFT, 3, 0, dac_analog_tlv), |
|
}; |
|
|
|
static const struct snd_kcontrol_new tas5722_snd_controls[] = { |
|
SOC_SINGLE_EXT_TLV("Speaker Driver Playback Volume", |
|
0, 0, 511, 0, |
|
tas5722_volume_get, tas5722_volume_set, |
|
tas5722_dac_tlv), |
|
SOC_SINGLE_TLV("Speaker Driver Analog Gain", TAS5720_ANALOG_CTRL_REG, |
|
TAS5720_ANALOG_GAIN_SHIFT, 3, 0, dac_analog_tlv), |
|
}; |
|
|
|
static const struct snd_soc_dapm_widget tas5720_dapm_widgets[] = { |
|
SND_SOC_DAPM_AIF_IN("DAC IN", "Playback", 0, SND_SOC_NOPM, 0, 0), |
|
SND_SOC_DAPM_DAC_E("DAC", NULL, SND_SOC_NOPM, 0, 0, tas5720_dac_event, |
|
SND_SOC_DAPM_POST_PMU | SND_SOC_DAPM_PRE_PMD), |
|
SND_SOC_DAPM_OUTPUT("OUT") |
|
}; |
|
|
|
static const struct snd_soc_dapm_route tas5720_audio_map[] = { |
|
{ "DAC", NULL, "DAC IN" }, |
|
{ "OUT", NULL, "DAC" }, |
|
}; |
|
|
|
static const struct snd_soc_component_driver soc_component_dev_tas5720 = { |
|
.probe = tas5720_codec_probe, |
|
.remove = tas5720_codec_remove, |
|
.suspend = tas5720_suspend, |
|
.resume = tas5720_resume, |
|
.controls = tas5720_snd_controls, |
|
.num_controls = ARRAY_SIZE(tas5720_snd_controls), |
|
.dapm_widgets = tas5720_dapm_widgets, |
|
.num_dapm_widgets = ARRAY_SIZE(tas5720_dapm_widgets), |
|
.dapm_routes = tas5720_audio_map, |
|
.num_dapm_routes = ARRAY_SIZE(tas5720_audio_map), |
|
.idle_bias_on = 1, |
|
.use_pmdown_time = 1, |
|
.endianness = 1, |
|
.non_legacy_dai_naming = 1, |
|
}; |
|
|
|
static const struct snd_soc_component_driver soc_component_dev_tas5722 = { |
|
.probe = tas5720_codec_probe, |
|
.remove = tas5720_codec_remove, |
|
.suspend = tas5720_suspend, |
|
.resume = tas5720_resume, |
|
.controls = tas5722_snd_controls, |
|
.num_controls = ARRAY_SIZE(tas5722_snd_controls), |
|
.dapm_widgets = tas5720_dapm_widgets, |
|
.num_dapm_widgets = ARRAY_SIZE(tas5720_dapm_widgets), |
|
.dapm_routes = tas5720_audio_map, |
|
.num_dapm_routes = ARRAY_SIZE(tas5720_audio_map), |
|
.idle_bias_on = 1, |
|
.use_pmdown_time = 1, |
|
.endianness = 1, |
|
.non_legacy_dai_naming = 1, |
|
}; |
|
|
|
/* PCM rates supported by the TAS5720 driver */ |
|
#define TAS5720_RATES (SNDRV_PCM_RATE_44100 | SNDRV_PCM_RATE_48000 |\ |
|
SNDRV_PCM_RATE_88200 | SNDRV_PCM_RATE_96000) |
|
|
|
/* Formats supported by TAS5720 driver */ |
|
#define TAS5720_FORMATS (SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S18_3LE |\ |
|
SNDRV_PCM_FMTBIT_S20_3LE | SNDRV_PCM_FMTBIT_S24_LE) |
|
|
|
static const struct snd_soc_dai_ops tas5720_speaker_dai_ops = { |
|
.hw_params = tas5720_hw_params, |
|
.set_fmt = tas5720_set_dai_fmt, |
|
.set_tdm_slot = tas5720_set_dai_tdm_slot, |
|
.mute_stream = tas5720_mute, |
|
.no_capture_mute = 1, |
|
}; |
|
|
|
/* |
|
* TAS5720 DAI structure |
|
* |
|
* Note that were are advertising .playback.channels_max = 2 despite this being |
|
* a mono amplifier. The reason for that is that some serial ports such as TI's |
|
* McASP module have a minimum number of channels (2) that they can output. |
|
* Advertising more channels than we have will allow us to interface with such |
|
* a serial port without really any negative side effects as the TAS5720 will |
|
* simply ignore any extra channel(s) asides from the one channel that is |
|
* configured to be played back. |
|
*/ |
|
static struct snd_soc_dai_driver tas5720_dai[] = { |
|
{ |
|
.name = "tas5720-amplifier", |
|
.playback = { |
|
.stream_name = "Playback", |
|
.channels_min = 1, |
|
.channels_max = 2, |
|
.rates = TAS5720_RATES, |
|
.formats = TAS5720_FORMATS, |
|
}, |
|
.ops = &tas5720_speaker_dai_ops, |
|
}, |
|
}; |
|
|
|
static int tas5720_probe(struct i2c_client *client, |
|
const struct i2c_device_id *id) |
|
{ |
|
struct device *dev = &client->dev; |
|
struct tas5720_data *data; |
|
const struct regmap_config *regmap_config; |
|
int ret; |
|
int i; |
|
|
|
data = devm_kzalloc(dev, sizeof(*data), GFP_KERNEL); |
|
if (!data) |
|
return -ENOMEM; |
|
|
|
data->tas5720_client = client; |
|
data->devtype = id->driver_data; |
|
|
|
switch (id->driver_data) { |
|
case TAS5720: |
|
regmap_config = &tas5720_regmap_config; |
|
break; |
|
case TAS5722: |
|
regmap_config = &tas5722_regmap_config; |
|
break; |
|
default: |
|
dev_err(dev, "unexpected private driver data\n"); |
|
return -EINVAL; |
|
} |
|
data->regmap = devm_regmap_init_i2c(client, regmap_config); |
|
if (IS_ERR(data->regmap)) { |
|
ret = PTR_ERR(data->regmap); |
|
dev_err(dev, "failed to allocate register map: %d\n", ret); |
|
return ret; |
|
} |
|
|
|
for (i = 0; i < ARRAY_SIZE(data->supplies); i++) |
|
data->supplies[i].supply = tas5720_supply_names[i]; |
|
|
|
ret = devm_regulator_bulk_get(dev, ARRAY_SIZE(data->supplies), |
|
data->supplies); |
|
if (ret != 0) { |
|
dev_err(dev, "failed to request supplies: %d\n", ret); |
|
return ret; |
|
} |
|
|
|
dev_set_drvdata(dev, data); |
|
|
|
switch (id->driver_data) { |
|
case TAS5720: |
|
ret = devm_snd_soc_register_component(&client->dev, |
|
&soc_component_dev_tas5720, |
|
tas5720_dai, |
|
ARRAY_SIZE(tas5720_dai)); |
|
break; |
|
case TAS5722: |
|
ret = devm_snd_soc_register_component(&client->dev, |
|
&soc_component_dev_tas5722, |
|
tas5720_dai, |
|
ARRAY_SIZE(tas5720_dai)); |
|
break; |
|
default: |
|
dev_err(dev, "unexpected private driver data\n"); |
|
return -EINVAL; |
|
} |
|
if (ret < 0) { |
|
dev_err(dev, "failed to register component: %d\n", ret); |
|
return ret; |
|
} |
|
|
|
return 0; |
|
} |
|
|
|
static const struct i2c_device_id tas5720_id[] = { |
|
{ "tas5720", TAS5720 }, |
|
{ "tas5722", TAS5722 }, |
|
{ } |
|
}; |
|
MODULE_DEVICE_TABLE(i2c, tas5720_id); |
|
|
|
#if IS_ENABLED(CONFIG_OF) |
|
static const struct of_device_id tas5720_of_match[] = { |
|
{ .compatible = "ti,tas5720", }, |
|
{ .compatible = "ti,tas5722", }, |
|
{ }, |
|
}; |
|
MODULE_DEVICE_TABLE(of, tas5720_of_match); |
|
#endif |
|
|
|
static struct i2c_driver tas5720_i2c_driver = { |
|
.driver = { |
|
.name = "tas5720", |
|
.of_match_table = of_match_ptr(tas5720_of_match), |
|
}, |
|
.probe = tas5720_probe, |
|
.id_table = tas5720_id, |
|
}; |
|
|
|
module_i2c_driver(tas5720_i2c_driver); |
|
|
|
MODULE_AUTHOR("Andreas Dannenberg <[email protected]>"); |
|
MODULE_DESCRIPTION("TAS5720 Audio amplifier driver"); |
|
MODULE_LICENSE("GPL");
|
|
|